Question

A ball of mass 100g moving with a velocity of 10 m/s is stopped by a boy in 0.25seconds. Calculate the force applied by the boy to stop the ball.​

Answer 1

Explanation:

ans:Initial velocity, u= 10m/s

Final velocity, v= 0m/s

Time=0.2 seconds

Acceleration= ?

( as we know that to find acceleration the formula is v-u/ time taken

Acceleration= 0-10/0.2= -50m/s^2

Mass= 100g

( converting into kilograms )

100/1000= 0.1 kg

Then ,

Force = mass×acceleration

F=m×a

= 0.1× -50

= -5 Newton

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